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Alfredo Beltran

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Everything posted by Alfredo Beltran

  1. Hi This is an image of the IC2118 nebula, known as the Witch Head: On Astrobin Completely pre and post procesed iin PixInsight. Captured with SGP from the suburban area of Bogotá, Colombia. Thanks for looking! Regards, Alfredo
  2. Hi This is my version of the Whirlpool Galaxy M51, using the IDAS filter and taken with the ASI071 OSC. Telescope was a C925 EdgeHD at f10. Mount is a CEM60. Exposure: 4hr 50 min in total at unity gain (54 x 5 min). Full exposure details by clicking on the image. Thanks for watching! Regards, Alfredo
  3. Hi Thank you all for your comments. I upgraded the capture time in te original post. Full capture details are found on the link when clicking the image. I took the series of Ha images, then OII and finally SII with the OSC camera. After calibrating I extracted the red channel from Ha and SII images and one of the green channels from the OIII images (there are two because of the Bayer matrix RGGB). When stacking, I used drizzle 2x to recover original resolution. Since each image was stacked with one of every four pixels, 2x drizzle produces full resolution stacked images. I did
  4. Hi This is my version of the Rosette nebula using the Hubble and taken with the ASI071 OSC camera. Telescope was a C925 EdgeHD with Hyperstar lens. Exposure time: 4hr 50 min in total at unity gain 2hr 00 min (24 x 5 min) Ha 1h 15 min (55 x 5 min) OIII 1hr 35 min (19 x 5 min) SII This setup is awesome. A few years ago such an image just could’ve been taken with a monochrome ccd. Regards, Alfredo
  5. Good! How does it perform now? Id like to buy one to use with my C925 EdgeHD and hyperstar (f2.3), for RGB and narrow band (yes with an OSC since I’ve done it successfully with that combo and the DSLR). It can be done drizzling the es channel. Alfredo
  6. Very, very nice image of the Iris Richard. Congratulations. I think the very low read noise and dark current of CMOS sensors let OSC Astro cameras to perform at very high levels now. The details in the dust are amazing. Is your camera the Pro version? Regards, Alfredo
  7. Hi Before the end of the year I want to share with you this image of IC 1848, also known as the Soul Nebula in Cassiopeia. I took this image in RGB with the IDAS D1 filter in RGB and the Baader Ha 7nm filter to enhance the nebula in the red channel. Total exposure was 5hr 16 min at f2.3 with a modified Canon T1i on a hyperstar lens and a C925 EdgeHD. Of that time, 2 hr 25 min (29 x 5 min) at ISO 1600 were for Ha, and 1 hr 51 min (57 x 3 min) at ISO 800 for the RGB image. Mount is an iOptron CEM60. Captured in SGP and completelly processed with Pixinsight. IC 1848 on Flickr
  8. Adam I measured the parameters for my camera and published here, based on Craig Stark's article . For use it at f10, or narrow band, I've found the less read noise helps quite a lot. More than ISO 800. Regards, Alfredo
  9. Thank you very much Adam In fact I use ISO 1600 for narrow band at f2.3 or RGB at f10, because I've found it is the sweet spot because of the low read noise. For rgb at f2.3 I use ISO 800. Alfredo
  10. Thank you Ouroboros. Not really. It was because ISO 1600 has the less read noise for my camera, and thus I chose it to get the most possible detail on the image. Alfredo
  11. Thank you Mark Indeed we have sighting opportunities for both hemispheres. Alfredo
  12. Thank you Rodd. The C11 will be more than capable at f10. Worth to try. Regards Alfredo
  13. Thanks! Thank you. Fortunately, for us here it passes really near the zenith, and is easier to image. The most northern objects are very difficult from here since we are at just 4.8 degrees north. Thanks indeed, Patrick. Alfredo
  14. Thank you all for your encouraging comments! It was a nice galaxy to image and, because of its size, I opted for f10 to give it a more starring role on the FOV. I've found that the key is to do the maximum dithering possible during capture win SGP and collect all of the calibration files on the next few days at most. Pixinsight is also a wonderful tool to do the full processing since it lets to pull every single detail of the image. Alfredo
  15. Hi I want to share with you my latest image. It is the Sombrero Galaxy - M104. I took it from the terrace of my house on the suburban area of Bogotá, Colombia (8 million people city) with a Modified Canon T1i and an IDAS LPS D1 filter. Telescope is a C925 EdgeHD at f10 on a CEM60 mount. Total exposure time is 8.5 hr at ISO 1600. Pre and postprocessed entirely with Pixinsight. Captured with Sequence Generator Pro - SGP. Thanks for looking! Alfredo Link to full resolution M104 image on Flickr
  16. Thanks Patrick and Martin. I think the Ha signal helps a lot to enhance the detail on this nebula since it is very strong. Alfredo
  17. Thank you very much Sara! You're right about the link. I posted it so people could see the image at full resolution. Solution may be to post it and also a reduced version of the image. Good tip. Alfredo
  18. Hi I want to share with you all this HaRGB version of the Cone Nebula. It is te result of 4hr 30 min RGB and 5 hr 50 min in Ha, for a total integration time of 10 hr 20 min. Taken with a modified Canon T1i and a C925 EdgeHD with hyperstar. Captured with SGP and processed entirely with Pixinsight. https://flic.kr/p/RrvKKX Thanks for looking! Alfredo
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